Nipple-making machine



Sept. 9, 1924.

H. MORRISON NIPPLE MAKING MACHINE 5 Sheets-Sheet l Filed March 17. 1920 MNQW Nh o um AM.

N, MN www Sept. 9 1924. 1,507,849

' H. -MORRISON NIPPLE MAKING MACHINE y Filed March 17. 1920 3 Sheets-Sheet 2 l N N 5 'I H lq 1 'FWN N 2 $4 i l w l 1 H l .i a Q v Q A nvewboz @ttm/Megs" Sept. 9, 1924. i 1,507,849

H. MORRISON NIPPLE MAK NG MACHINE Filed March l'7. 1920 3 Sheets-Sheet 3 @wom/toa y Jaz u alitoam ms Patented Sept. 9, 1924.

PATENT OFFICE.

HACKLEY MORRISON, OF RICHMOND, VIRGINIA.

NIPPLE-MAKING MACHINE. l

Application le'd March 17, 1920. Serial No. 366,662.

To all whom t mail concern.'

.Be it known that I, HACKLEY MORRISON, citizen of the United States, residing at Richmond, in the county of Henrico and' tions of pipe used in the manufacture of nipples.

- The general object of the invention is to provide a practical and ellicient machine,

operating entirely automatically, for trimming or threading the blanks as they are fed down a runway, and for discharging the finished articles into a receptacle.

More speciically, the invention seeks to provide improved feeding mechanism, improved take-ofl' mechanism, novel and effective automatic chucking mechanism, having means to prevent crushing of the blanks, and practical and readily operated means for adjusting the machine to operate on blanks of different lengths.

With the aboveand other objects in yiew, the invention consists in the construction, combination and arrangement of parts hereinafterdescribcd and claimed, and illustrated in the accompanying drawings, in which Fig. 1 isa side elevation of my improved machine?A Fig. 2'is a plan view thereof;

Fig. 3 is a transverse section substantially on the line 3-3 of Figure 2 looking in the direction of the arrow; A

Fig. 4 is an elevation looking atthe right hand end of the machine;

Y Fig. 5 is a detail perspective view on an I plan employ for reaming nipple blanks; an

Fig. 6 is a fragmentary front elevation, parts being in section, showing a modified arrangement of chuck ja'ws which I Vsometimes prefer to employ.

Referring to the drawings inl detail, the machine comprises a bed plate 1, supported on-a suitable body or frame 2. Power is enlarged scale showing a form of tool which Jmodat `10 and 11 are provided with screw boxes supplied to the machine by means of a belt working on a set of cone pulleys 3 mounted on a shaft 4,journaled in suitable pedestals 5 Secured to the bed of the machlne.

In order to simultaneously operate on both ends of the blanks I provide a pair of alined horizontally disposed tool spindles 6 and 7. These spindles are feathered adjacent their inner ends in sleeves 6a and 7, which are journaled inrbearings 8 and 9, respectively carried by working heads 10 and 11 which are slidably mounted on the bed 1 of the machine so that they can be moved toward and away from each other. Keyed to the sleeves 6a' and 7a are gears 12 and 13, respectively, which are set into the bea-rings 8 and 9.as shown.

Feathered on the power shaft 4 are a pair of gears 14 and 15. The gear 15 is disposed in the 'same plane as and meshes directly with the gear 13, while the gear 14 drives the ear 12 through the medlum of an intermediate gear 16. By virtue of this arrangement the spindles 6 and 7 are caused to rotate in opposite directions, thus making it possible to thread both ends of a nipple blank properly, and also serving, in great measure, to relieve the chucking device from tortional strains. Instead of toothed gearing, it is obvious that belt gearing may be` employed, if desired, belt wheels being feathered on the tool spindles in place of gears 12 and 13, and driven by open and crossed belts from pulleys on the shaft4, or other countershaft. The gears 14, 15 and 16 are positioned by means of brackets 17 and 18 rigid with the working .heads 11 and 10, res ectively. "It will'therefore be seen that al of the gear wheels are constrained to move with the workin heads longitudinall of their respective s afts as the work-v ing eads are adjusted. The brackets 17 and 18, it will be understood, carry .,bearm and 20 in which the power shaft 4 is )our-y naled.

-In order to adjustfthe working heads toward nd 'from each other, so as 'to'accomblanks of vaxrying lengths, the heads or nuts 21 and 22, respectively, with which engage oppositely screw threaded portions 23 and 24 of an adjusting shaft 25, jour-y naled in thrust bearings 26 carried by the bed of the machine, `*and provided at lits vend a worm 33. This worm 33 meshes with a worm wheel 34 fast on a-cam shaft 35 extending underneath the bed of the machine longitudinally thereof, and journaled in suitable brackets 36, 37.,

The working heads 10 and 11 are' formed respectively with extensions carrying depending brackets38 and 39 provided with lugs 40 and 41, in which are pivotally mounted levers 42 and 43. The lower ends of these levers are preferably oH-set, as indicated at 4211 and 43a, and are provided with anti-friction rollers 44 and 45. `These work against cams 46 and 47 feathered on the cam shaft and capable of longitudinal movement thereon, although compelled to rotate therewith. The lower ends of brackets 38 and 39 embrace the shaft 35 and. constitute abutments against which the inner ends of the cams 46 and 47 bear. The cams are held in close engagement' with such brackets by means of coil springs 48'and 49 secured at one end 'of the levers 42 and 43, and at the other end of pins 50, 51, set, into the brackets 38 and 39. It will be understood that as the high parts of the cams 46 and 47 pass under the rollers 44 and 45, the

springs 48 and 49 yield to permit the out'- ward movement ofthe lower ends of levers 42 and 43. i

The upper ends of levers 42 and 43 are b ifurcated as shown at '52, 53, and carry circular frames 54, 55, through which the ends of spindles 6 and'7 are freevto slide, and aie also capable of rotation therein. The frames 54 and 55 are provided with trunnions 56 and 57 mounted in cross heads 56a and 57a, mounted to slide in the slotted or bifurcated ends ofy the levers. In this manner the levers can turn about their pivots without binding or otherwise interfering with the free straight line movement of the tool spindles.

The spindles 6 and 7 carry near their ends collars 60 and 61, respectively, which are adjustable longitudinally of the spindles by means of screw threads 62, 63, or otherwise, and can be set in any position to which they are' shifted. Helical springs 58 and 59 surround the spindles 6 and 7 respectively, 4and are interposed between the adjustablea collars 60, 6l and the circular frames 54, 55. These springs act as a cushion through wliich the movement of the cam operated levers 42 and 43 is transmitted to the tool spindles, and the object of these cushions is to protect the machine against excessive strains, should the tool fail to properly cut into the blank, or should any abnormal resistance, due to other causes, such as that caused by slight variation in the length of the blanks, be encountered. By means of the adjustable collars, the tension on the springs 58 and 59 may be varied to suit the particular tools with which the tool spindles are equipped. i

It will be understood that a variety of different tools may be operated by the spindles 6 and 7. In certain classes of work these spindles may carry drills; in other cases, they could be equipped with cutters of any suit-able character; and as shown in the drawings, the spindles carry combined chamferingl and reaming tools such as illustrated in detail in Figure 5. These tools are indicated in theirentirety by the reference numerals 64 and 65 (see Figure 2), and each preferably co-nsists of an elongated body carrying a plurality of wings. The forward end of each of these wings 65b (see Figure 5) is cut away to form a notch 65, such notch having an inner wall 65a. The walls 65a conform more or less closely to the shape of a cone, and are adapted to enter and ream out the inside of a nipple blank,

while the outer walls of the notches 65,

which are of more or less flaring shape, engage over the outside of the nipple blank and smooth olf and chamfer the outer edge thereof. While in Fig. 5, I have shown the reaming and chamfering cut-ters as formed integral, these cutters may be formed of separate removable blades, as embodied, for example, in an improved tool which I have devised, and which forms the subject-matter of my co-pending application, Serial No. 430,866, filed December 15, 1920.

In 'order -to properly hold the blanks 1n posit-ion to be operated on byl the tools /carried by the spindles, Il provide an improved chucking device which forms an important part of my invention. This device consists of fixed and movable members or jaws, adapted to grip the blanks between them. The upper jaw is designated at 66 and is carried by a shank 67, having a screw threaded portion on which works a nut 68. This shank is adjustable vertically through an opening in the middle member of a frame or yoke 71, and is provided at itsl upper end with a set screw terminating in a wing nut 69. This nut engages on top of the yoke 70', and by manipulating the nuts 68 and 69 it is evident that the chuck member 66 may be adjusted slightly vertically relative to the axis to the tool spindles,

thus providing means for compensating slight variationsgdue to wear or grinding of the chuck members.

Cil

The yoke or 'frame 70, 71 is supported by means of four posts 72 set into the bed of the machine and having screw threaded upper ends 73. By means of lock nuts 74 working on the screw threaded 4.ends 73, and arranged one above and one below the yoke, the height of the yoke may be adjusted as desired, thus providing further means for variations in the length of the chuck jaws.

The chuck membert 66 is formed with a concave gripping face or seat 75, and at the center of vsuch seat is formed a socket in which rests a short helical spring 76. The purpose of this spring is to eject the finished blank from the concave seat 75, should it tend to sti'ck when released.

The movable chuck member 78 also has a concave face or seat 77, as clearly shown in Figure 3. This member preferably consists of a pair of parallel elements spaced apart by a shim block 7 9 (see Figure 1). A bolt 81 passes throu h the two elements of the chuck member 8, shim block 79, and the bifurcated upper end 80 of a plunger 82..

This plungerv is capable of reciprocating vertically in a guideor housing 83 depending from .the bed of the machine. Also working freely in the housing 83 and disposed below the plunger 82 is a second plunger 85, a stif'l' short compression spring 84 being interposed between the two plungers within the housing.

The lower end of the plunger 85 carries` a roller 86 engaging a cam 87 rigidly secured to the cam shaft 35. It is there-fore obvious that as this cam revolves the plungers 85, 82, together with the lower chuck member, will be vertically reciprocated toward and from the fixed chuck member so that the nipple blanks are alternately gripped between the two chuck members and released. The function of the springs 84 is to provide a yielding cushion between the cam operated plunger and plunger 82, so as to prevent crushing of the blank. Owing to slight irregularities in the size of the blanks4 it would be very difficult to so adj ust the chuck members that they wouldv properly hold every blank, if such chuck members were both rigid and nnyielding. By virtue of the cushion spring, however, I am enabled to obtain a firm grip on every blank, notwithstanding variations in size, andl this without danger of crushing the blank or straining the machine. v

In order to feed the cylindrical blanks to the'chucking. device, I provide an inclined run-way of improved construction. As clearly shown in Fi res 2 and 3, this runway comprises a palr of angle irons 88, or other suitably shaped bars, each of which is provided with a pair of depending ears 89 which engage the threads of a pair of shafts 90 and 91, each shaft having at each side of its center oppositely disposed screw-threads.

The shafts 90 and 91 are journaled in bearings carried by a frame 92, which is pivotally supported at its inner end n a shaft 93 mounted on standards or brackets 93a. At its outer end the frame 92 has a pin-and-slot connection with al cross-head 94, adjustably supported on threaded posts 94a. The crosshead is held in4 adjusted position by means 0f lock nuts 94e".` 90 and 91 is secured a small bevel pinion 95, and -these pinions mesh with similar bevel gears 96 fast on a shaft 96a journaled in portions 96b of the frame 92. A hand wheel 97 is Secured to the end of lshaft 96a, and it 'will be evident that byvturning Athis hand wheel the shafts 90 and 91 may be caused to To one end of each shaft rotate synchronously in either direction, thus causlng the bars 68 to move toward or away from each other, as required, while remaining always parallel. By this means, the run# way can be readily adjusted to receive blanks of di'erent lengths.

Supported by each bar 88 is a track member formed of a rod having a transversely inclined upper surface, such as, preferably,v

a rod 98. These rods are pivoted at their inner ends as indicated at 99 (Figure 3), and thelrouter ends are preferably bent at right angles, and screw-threaded as indicated at 100. A grooved wing nut 101, engaging the screw-threaded nut 100 and working in an opening in the supporting bar 88, serves to raise or lower the outer end of the rod 98, and thus vary its inclination relative to the supporting bar 88. It will be particularly noted that the rods 98 are carried by the bars 88 in such a manner as to be Well spaced vertically therefrom. This is for the purpose of preventing the blanks being clogged by chips or shavings from the tools, as would occur if the run-way consisted of a flatsurface. By forming the runway rails of round or otherwise transversely inclined rods, affording but a single point of contact with the cylindrical blanks, clogging is prevented, as the chips will not accumulate upon such a rod. The rods are spaced above the supporting bars so as to clear' any accumulation of chips whichmay cling te` such bars.4 It has been found in practice that a run-way constructed as'described gives the mosti satisfactory results and never becomes clogged. The vertical portions of the bars 88 which are disposed at the outside of each rod 98, act as guard plates between which the blanks are received, and which serve to guide the blanks as they travel down the run-way, so as to prevent them froml falling oil. They also serve as a guage to prevent the feeding to the machine of blanks longer than those for which the working heads are set.

In order to remove the finished blanks or articles from the machine and'deposit them in a suitable receptacle, I provide rso an improved take-oil' mechanism Ywhich also forms an important part of my invention.

Referring especially to Figure 3, this takeolf mechanism comprises an inclined table 102, on which in mounted to reciprocate a slide 103, having a depending lug 104 extending through a slot 105 in the table. The lug 104 is connected by means oit a link 106 with the upper end of a lever 107 pivoted at 108 and carrying at its lower end a roller 109, engaging a specially shaped cam 110 on the shaft 35. A spring 111 extending between the upper end of a lever 107 and the .iixed support serves to cause the roller 109`to follow the cam.

Mounted on the slide 103 is a stripper plate 112 having a bifurcated inner end 113 arranged to straddle or embrace the lvertical reciprocable chuck member 78.

The operation of the machine will now be briefly described. Power being supplied as above described, and the working heads 10 and 11 and track rails 98 having been properly adjusted for the particular length of blanks being operated upon, such blanks are caused to roll *down the run-way to the chucking device. rlihese blanks may be placed manually at the upper end of the runway, as indicated by X in Figure 3, or they may be led from a hopper in any suitable yor well-known manner. 1t will be particularly observed that the lower or inner end of the runway is substantially at the level of the upper end of the chuck member 78 when in its lowermost position, as shown in Figure 3. `When in this position it is obvious that a cylindrical blank will roll down the run-way and into the concave seat 77 of the chuck member 78. A. suitable stop is provided, if necessary, to prevent the blank from rolling off the other side of such chuck member. As the cam 87 turns over the blank will be carried up into engagement with the upper chuck member 66 and iirmly gripped between the two chuck members. At this moment the cams 16 and 47 are so timed as to move the tool spindles toward each other, thus bringing the tools simultaneously into engagement with the opposite end of the blank in thechuck. The cam 87 has suliicient dwell to hold the blank while the tools are in operation. The chuck member 78 then recedes, carrying with it the nished blank. As the chuck member 78 begins to recede, the cam 11.0 is so timed as to project the stripper plate 112 into the position shown in Figure 3, and 'it will be seen therefore that as the chuck member 78 moves downwardly with the finished blank thereon., such blank will engage the bifurcated portion 113 of the stripper plate and be removed or lifted from' the chuck member. The finished blank or article thereupon rolls down the inclined stripper plate 112 and table 102 into a suitable box or receptacle of the runway.

" monete 114, while the chuck member 78 continues its downward movement. The stripper plate 112 meanwhile is shifted to the left as viewed. in Fig. 3, and remains in such shifted position until Vthe chuck member is about to complete its next upward stroke. Thus the stripper plate does not interfere with the chucking of the blanks. When chuck member 78 reaches its lower-most position another blank automatically rolls into position therein. 1t will be understood that the run-way is kept full of blanks so that they are continuously crowding downward, so long as they are supplied to the upper end Should the supply fail, however, the blanks in the runway will continue to be automatically fed into the chuck until they are all used up, and in this event, the machine may then continue to operate without danger of injury. 1n all of its positions, except that illustrated in Figure 3,

yautomatically falls into position therein.

rllhe chuck member acts as a cradle to carry the banks upwardly into position to be engaged by the tools, and as it carries them down again they are removed by the stripper plate, which is projected underneath the blank as the chuck member 7 8 begins its downward stroke. y

While 1 have thus far described the use of a single chuck jaw at the top and a pair of chuck jaws at the bottom, 1 desire it to be understood that 1 contemplate and often prefer reversing this arrangement. This reverse construction is illustrated in Fig. 6, and by reference to this ligure, it will be seen that 1 may provide a pair of upper chuck jaws or elements 66 and 66. rThese may be provided with springs such as 76 in F ig. 3 and are held by means of wing nuts or the like 69, 69 in any desired two of a series of openings 70a formed in the supporting yoke 70. By this means, a spacing screw threaded standard 7 8, adjustably received in athreaded socket 82a of a plunger 82', and secured by means of a lock nut 7 8a. 1n order to prevent accumulations of shavings and the like from clogging the plunger, 1 preferably provide a shield 7 8', which may be circular as shown, having a central hub threaded on to the standard 7 8. This eectually protects the plunger from contact with foreign matter.

1t will thus be seen that I have provided a complete automatic nipple manufacturing machine, having many novel and valuable features, and it is thought that the many advantages of the invention will be readily appreciated without further discussion.

What I claim is l. In a machine of the character described, the combination with a pair of alined tool spindles, of a pair of adjustable working heads in which said spindles are journalled, means for rotating said spindles, means for reciprocating said spindles toward and from each other comprising a pair of levers pivoted on said Working heads, a pair of cams arranged to engage and oscillate said levers, means between the adjacent ends of said spindles for supporting blanks Ito be operated upon, and means for adjusting said working heads and thus varying the distance between the spindle ends so as to operate upon blanks of different lengths, said levers and cams movingtogether when the working heads are adjusted, whereby a constant relation between them is maintalned.

2. In a machine of the character described, the combination with a pair of alined tool spindles, means for rotating and reciprocatng said spindles, said means comprising a cam shaft, and a pair of cams rotatable with but slidable on said shaft, means for supporting blanks between the adjacent ends of said spindles, means for adjusting said spindles toward and from each other so as to accommodate blanks of different lengths, and means for simultaneously shifting said cams a corresponding distance along said shaft.

3. In a machine of the character described, the combination with a pair of alined tool spindles, means for rotating and reciprocating said spindles, said means comprising a cam shaft, and a pair of cams rotatable with but slidable on said shaft, a pair of pivoted levers for communicating motion from said cams to said spindles, means for supporting blanks between the adjacent ends of said spindles, means for adjusting Vsaid spindles toward and from each other to accommodate blanks of'different lengths, and means for simultaneously" shifting said cams and the pivot-points of said levers a corresponding amount. Y

4. In a machine of the character described, the combination with a pair of alined tool spindles, means for rotating and reciprocating said spindles, a pair of working heads in which said spindles are journaled, a cam shaft, cams slidable on said shaft, a pair of levers for communicating motion from said cams to said spindles, said levers being pivoted on said working heads, means `for supporting blanks between said working heads, means for adjusting said working heads toward and from each other to accommodate blanks of different lengths, and means for simultaneously shifting said cams a corresponding distance on said shaft, whereby the relation of said cams to Said levers is maintained constant.

5. In a machine Aof the character described, the combination with a pair of alined tool spindles, of a pair of working heads in which said spindles are journaled, means for reciprocating said spindles through such journals, means between the working heads for supporting blanks to be operated upon, means for adjusting said working heads toward and from each other to accommodate blanks of different lengths,and means for rotating lsaid tool spindles comprising a power shaft parallel with said spindles, and intermeshing gearing feathered on said power shaft and spindles respectively, all of said gearing being shiftable with said working heads longitudinally of said shaft'and spmdles.

6. In a machine of the character described, thecombination with a pair of alined tool spindles, a pair of working heads in which said spindles are journalled, means for rotating and 'reciprocating said spindles, means between the 'adjacent ends of said spindles for supporting blanks to be operated upon, and means for simultaneously adjusting said working heads the same distances toward oraway from each other so that blanks of different lengths maybe accommodated between the spindle ends, and sothat said ends are always equally spaced from the blank sup orting means.

7. In a mac ine of the character described, the combination with a pair of alined tool spindles, of means for rotating and reciprocating said spindles, and means located between the adjacent ends of the spindles for gripping the blanks to lbe operated upon, said means comprising a pair ofchuck members, a rigid frame in which one of said members is supported, cam operated means for moving the other member toward the lirst to grip a blank between them, said camoperated member comprising a plunger formed in two sections of the same diameter, arranged in alinement, a stationary guide or housing enclosing sa-id sections, and in which both sections slide, and a spring interposed between said sections within said housing, whereby said chuck member is cushioned, and all the parts protected from foreign matter.

8. In a machine for manufacturing cylindrical articles, the combination with a tool, and means for driving it, of a chuckv device for holding the blank in horizontal position adjacent the tool, said chuck device comprising a vertically reciprocable member having a seat in which the finished article rests when released, a stripper mounted to reciprocate in a plane lying between the upper and lower limits of travel of said seat, and means for automatically reciprocating said member and stripper in such timed relation that said stripper is moved into a position adjacent said member and' below the seat therein when the member is elevated, so that, when said member descends, the nished article resting in said seat is brought 4into engagement with and deposited upon said stripper.

9. ln a machine for manufacturing cylindrical articles, the combination withl a tool, and means for driving it, of a chuck device for holding the blank in horizontal position adjacent the tool, said chuck device comprising a vertically reciprocable member having a seat in which) the iinished article rests when released, a stripper mounted to reciprocate in a plane lying between the upper and lower limits of travel of said seat, said stripper having a bifurcated portion, and means for automaticallyT shifting said stripper and member in timed relation so that the biurcated portion of the former is caused to straddle the latter at a point below the seat when the seat is in its upper position, whereby, when the said member moves downwardly, the iinished article resting in said seat is deposited upon the stripper 10. ln a machine for manufacturing cylindrical articles, the combination with a tool, and means fordrivingit, of a chuck device tor holding the blank in horizontal position adjacent the tool, said chuck device comprising a vertically reciprocable member on which the inished article rests when released, a stripper mounted to reciprocate toward and from said chuck device, andmeans for automatically reciprocating said member and stripper in such timed relaticnthat said stripper is shifted into a position below and in the path of travel of said article as said member, bearing the article, descends, whereby the article is deposited upon the stripper bythe descending chuck member.

'11.. ln a machine for operating on cylindrical blanks, the combination with a horizontal tool spindle, and means for driving it, of a chucking device arranged adjacent thereto for gripping the blanks, said chucking device comprising an upper fixed jaw, and a lower vertically movable jaw, means for reciprocating said lwer jaw, an inclined runway down which the blanks roll to the chucking device, the upper endof said movable lower jaw being so shaped as to receive and retain a blank as it moves upward, a stripper plate, and means for automatically projecting the end of said plate into the path of the blank as the lower jaw, carrying the blank moves downward. whereby the blank is removed from the said lower jaw onto the stripper plate.

l2. ln a machine for operating on cylindrical blanks, the combination with a tool and means for driving it, of a chuck adjacent the tool, and an inclined runway down which the blanks roll to the chuck, said jacent said member and means for automatically shifting said stripper plate into position to engage the ends of the finished article projecting beyond the chuck device and remove the article as the chuck member moves downwardly.

lll. ln a machine for manufacturing cylindrical articles, the combination with a tool, and means for driving it, of a chuck device for holding the blank in horizontal ppsition adjacent the tool, said chuck de-- vice comprising a vertically reciprocable member on which the finished article rests when released, an inclined stripper plate having a biiurcated portion, and means for automatically shifting said stripper plate so that the bifurcated portion thereof is caused to embrace said chuck member and lift the article therefrom as the member moves downwardly.

l5. ln a machine for manufacturing cylindrical articles, the combination with a tool, and means for driving it, of a chuck device for holding the blank in horizontal position adjacent the tool, said chuck devlce comprising a vertically reciprocable member on which the finished article rests when released, a stripper plate mounted adjacent said member, and means for automaticallyl projecting said plate into the path of the article as the said member bearing thevarticle moves downwardly, so that the article is thereby transferred from said member to the plate, and thus removed.

16. In a machine for manufacturing cyindrical articles, the combination with a rotary tool, and means for drivin@ it, of a chuck device for holding the blank in horizontal position adjacent the tool, said chuck device comprising a vertically reciprocable member for elevating the blank into position, and on which the nished article rests when released, a stripper plate mounted adjacent said member, means for shifting said stripper plate away from said reciprocable member as the latter moves upwardly with the blank so as to permit the blank to pass, and means for automatically projecting said plate into the path of the article as the said member moves down-- wardly, so that the article is thereby transferred from the member to the plate, and thus removed. 4, j Y

1uy l 17. In a machine of the character dejaws, a rigid frame in which said jaws may scribed, the combination with a horizontal be set in various spacedrelations, the lower 10 tool spindle, and means for rotating and member comprising a single movable jaw, reciprocating the same, of means located and means for reciprocating said movable adjacent the end of the spindle for gripping jaw toward and from said fixed jaws. the planks to be operated upon, said means In testimony whereof I afix my signaincluding a pair of chuck members, the -upture. per member comprising a pair of spaced HACKLEY MORRISON. 

